Expansion of (1-x)/((1-x)^2-3x^3).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =10a(5) =19a(6) =40a(7) =91a(8) =199a(9) =427a(10) =928a(11) =2026a(12) =4405a(13) =9568a(14) =20809a(15) =45265a(16) =98425a(17) =214012a(18) =465394a(19) =1012051a(20) =2200744a(21) =4785619a(22) =10406647a(23) =22629907a(24) =49210024a(25) =107010082a(26) =232699861a(27) =506019712a(28) =1100369809a(29) =2392819489